n!!!! - 1
Table
Format: small prime × proven prime<size> × (probable prime)<size> × [composite]<size> × {unknown}<size>
* 323: | \[323!!!!-1\] | 2 × 18976157 × 93843029372611<14> × [2585381121030685332510228533750611722263228558685687618541685203405217397408382086562624220636943637515335913879218160631122012757511633564053108631<148>] |